Affinage

DNAH1

Dynein axonemal heavy chain 1 · UniProt Q9P2D7

Length
4265 aa
Mass
487.5 kDa
Annotated
2026-04-28
24 papers in source corpus 10 papers cited in narrative 10 extracted findings

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

DNAH1 is an inner dynein arm heavy chain essential for the structural integrity and motility of sperm flagella and respiratory cilia. It resides in a defined axonemal inner dynein arm complex with ZMYND12, TTC29, and DNALI1, and its assembly into the axoneme depends on the CCDC39/CCDC40 ruler complex and on DNAH12, which physically interacts with DNAH1 and DNALI1 to recruit them to inner dynein arms [PMID:37934199, PMID:39056782, PMID:bio_10.1101_2024.06.20.599934]. Loss of DNAH1 abolishes inner dynein arms while leaving outer dynein arms intact, and secondarily disrupts the central pair of microtubules, radial spokes, and outer dense fiber organization, producing multiple morphological abnormalities of the sperm flagella (MMAF) and male infertility (PMID:24360805, PMID:37302001, PMID:33989052). Biallelic loss-of-function mutations in DNAH1 are a recognized genetic cause of MMAF-associated male infertility, confirmed across multiple independent patient cohorts and mouse models (PMID:24360805, PMID:30734403).

Mechanistic history

Synthesis pass · year-by-year structured walk · 6 steps
  1. 2013 High

    The first causal link between DNAH1 and flagellar biology was established: loss-of-function mutations abolish inner dynein arms and disorganize microtubule doublets in human sperm, identifying DNAH1 as essential for axoneme integrity and a genetic cause of MMAF-associated male infertility.

    Evidence RT-PCR, immunostaining, and TEM on sperm from patients with homozygous splice-site mutations

    PMID:24360805

    Open questions at the time
    • No direct protein interaction partners of DNAH1 were identified
    • Role in non-sperm cilia was not examined
    • Mechanism by which DNAH1 loss leads to central pair disruption was unclear
  2. 2016 Medium

    Replication studies confirmed that distinct DNAH1 mutations (splice-site and frameshift) converge on loss of DNAH1 protein and flagellar ultrastructural defects, solidifying loss-of-function as the pathogenic mechanism.

    Evidence RT-PCR, western blot, immunofluorescence, and electron microscopy on independent patient cohorts

    PMID:27573432 PMID:27798045

    Open questions at the time
    • No animal model yet available to test causality in vivo
    • Molecular partners within the inner dynein arm remained unidentified
  3. 2019 High

    A mouse model demonstrated that a Dnah1 missense mutation causes aberrant flagellar beating insufficient for zona pellucida penetration, establishing DNAH1's requirement for functional sperm motility beyond structural integrity.

    Evidence ENU mutagenesis mouse model with in vitro fertilization assays using zona-intact and zona-free oocytes

    PMID:30734403

    Open questions at the time
    • The missense allele may retain partial function; complete null phenotype in mouse not yet characterized
    • Downstream signaling or force-generation mechanism not resolved
  4. 2021 Medium

    DNAH1 deficiency was shown to specifically eliminate inner dynein arms and radial spokes while reducing DNALI1 expression, and to disrupt the central pair (assessed by SPAG6 staining), revealing that DNAH1 loss has cascading effects on multiple axonemal substructures and partner protein stability.

    Evidence TEM, immunofluorescence with central pair and IDA markers, quantitative PCR, and Dnah1 KO mouse models

    PMID:33989052 PMID:34867808

    Open questions at the time
    • Direct physical interaction between DNAH1 and DNALI1 not yet demonstrated
    • Whether a DNAH1 isoform2 provides partial compensation in vivo remained unclear
  5. 2023 High

    DNAH1 was placed within a defined inner dynein arm complex containing ZMYND12, TTC29, and DNALI1, and its selective absence from the inner (but not outer) dynein arm was confirmed with specific markers, resolving its precise sub-axonemal identity.

    Evidence Reciprocal co-immunoprecipitation, comparative proteomics in Trypanosoma brucei and Ttc29 KO mice, RNAi, ultrastructure expansion microscopy, and immunostaining with IDA/ODA markers in patient sperm

    PMID:37302001 PMID:37934199

    Open questions at the time
    • Stoichiometry and direct binding interfaces within the ZMYND12–TTC29–DNAH1–DNALI1 complex are unresolved
    • No structural model of the complex exists
  6. 2024 Medium

    Assembly of DNAH1 into the axoneme was shown to depend on the CCDC39/CCDC40 96 nm ruler complex in respiratory cilia and on DNAH12 in sperm flagella, positioning DNAH1 downstream of two distinct assembly/recruitment pathways.

    Evidence Immunofluorescence of respiratory cilia from CCDC39/CCDC40-mutant patients; co-immunoprecipitation of DNAH12 with DNAH1 and DNALI1 in Dnah12 KO/knockin mouse models (preprint)

    PMID:39056782 PMID:bio_10.1101_2024.06.20.599934

    Open questions at the time
    • DNAH12 interaction data from preprint awaits peer review
    • Whether CCDC39/CCDC40 and DNAH12 act in the same or parallel pathways for DNAH1 recruitment is unknown
    • Tissue-specific differences in assembly requirements (cilia vs. flagella) not fully delineated

Open questions

Synthesis pass · forward-looking unresolved questions
  • The ATPase catalytic mechanism of DNAH1, its precise position along the 96 nm axonemal repeat, and the structural basis for its interactions with ZMYND12, TTC29, DNALI1, and DNAH12 remain uncharacterized.
  • No cryo-EM or high-resolution structure of DNAH1 or its complex
  • Enzymatic ATPase parameters not measured
  • Functional redundancy among inner dynein arm heavy chains not systematically tested

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0140657 ATP-dependent activity 2
Localization
GO:0005929 cilium 6
Pathway
R-HSA-1852241 Organelle biogenesis and maintenance 3 R-HSA-1474165 Reproduction 2
Partners
CCDC39CCDC40DNAH12DNALI1TTC29ZMYND12
Complex memberships
ZMYND12–TTC29–DNAH1–DNALI1 inner dynein arm complex

Evidence

Reading pass · 10 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2013 DNAH1 encodes an inner dynein arm heavy chain required for sperm flagellar axoneme integrity; loss-of-function mutations cause mislocalization of microtubule doublets and complete loss of inner dynein arms in sperm flagella, leading to multiple morphological abnormalities of the flagella (MMAF) and male infertility. RT-PCR, immunostaining, and transmission electron microscopy on patient sperm with homozygous splice-site mutation; confirmed absence of DNAH1 transcript and protein American journal of human genetics High 24360805
2016 DNAH1 mutations cause absence of DNAH1 transcript and protein in sperm, confirmed at both RNA and protein level, establishing loss-of-function as the pathogenic mechanism in MMAF. RT-PCR and immunochemistry on sperm from patients with homozygous splice-site mutation (c.8626-1G>A) Human reproduction (Oxford, England) Medium 27798045
2016 Homozygous frameshift mutation in DNAH1 (c.11726_11727delCT) abolishes DNAH1 protein in spermatozoa despite presence of mRNA, resulting in abnormal sperm flagella ultrastructure. Western blot, immunofluorescence staining, scanning electron microscopy, and transmission electron microscopy on patient sperm Clinical genetics Medium 27573432
2019 A missense mutation in Dnah1 (ferf1 allele) in mice causes abnormal sperm clumping, aberrant motility, and failure to penetrate the zona pellucida, but allows fertilization of zona-free oocytes, demonstrating DNAH1 is required for normal flagellar beating and zona penetration. ENU mutagenesis mouse model, in vitro fertilization assays with zona-intact and zona-free oocytes, sperm motility analysis Molecular reproduction and development High 30734403
2021 DNAH1 loss-of-function mutations cause disruption of the central pair of microtubules and disorganization of the fibrous sheath in sperm flagella, as confirmed by SPAG6 staining (a central pair marker), and DNAH1 isoform2 in mice may partially compensate for loss of the full-length protein. Whole-exome sequencing, transmission electron microscopy, immunofluorescence (SPAG6 staining), and generation of Dnah1 knockout mouse models Frontiers in endocrinology Medium 34867808
2021 DNAH1 biallelic variants cause absence of inner dynein arms and radial spokes, and displacement of dense fibers and microtubule doublets in sperm flagella; additionally, loss of DNAH1 leads to dramatically reduced expression of DNALI1. Transmission electron microscopy, quantitative PCR of DNALI1 mRNA in patient sperm DNA and cell biology Medium 33989052
2023 ZMYND12 forms an axonemal complex with TTC29 and DNAH1; loss of ZMYND12 causes altered localization of DNAH1, DNALI1, WDR66, and TTC29 in sperm, establishing DNAH1 as a component of a defined inner dynein arm complex critical for flagellum assembly. Co-immunoprecipitation, comparative proteomics (Trypanosoma brucei and Ttc29 KO mice), immunofluorescence, ultrastructure expansion microscopy, RNAi knockdown in T. brucei eLife High 37934199
2023 DNAH1 deficiency in sperm causes absence of inner dynein arms but not outer dynein arms, with secondary general ultrastructural disorganization including loss of the central pair and mislocalization of microtubule doublets and outer dense fibers. Immunostaining (inner vs. outer dynein arm markers), transmission electron microscopy on patient sperm with DNAH1 mutations Andrology Medium 37302001
2024 CCDC39 and CCDC40 (components of the 96 nm axonemal ruler complex) are required for proper assembly of inner dynein arm heavy chains including DNAH1, DNAH6, and DNAH7 in respiratory cilia; loss of CCDC39/CCDC40 causes conspicuous absence of DNAH1 from ciliary axonemes. Immunofluorescence analyses of respiratory ciliary axonemes from patients with CCDC39/CCDC40 mutations identified by next-generation sequencing Cells Medium 39056782
2024 DNAH12 physically interacts with DNAH1 and DNALI1 (inner dynein arm components), and DNAH12 deficiency leads to failed recruitment of DNAH1 and DNALI1 to inner dynein arms in sperm flagella, causing axonemal disorganization without affecting cilia. Co-immunoprecipitation (DNAH12 with DNAH1 and DNALI1), Dnah12 knockout and knockin mouse models, transmission electron microscopy, immunofluorescence bioRxivpreprint Medium bio_10.1101_2024.06.20.599934

Source papers

Stage 0 corpus · 24 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2013 Mutations in DNAH1, which encodes an inner arm heavy chain dynein, lead to male infertility from multiple morphological abnormalities of the sperm flagella. American journal of human genetics 335 24360805
2016 Whole-exome sequencing of familial cases of multiple morphological abnormalities of the sperm flagella (MMAF) reveals new DNAH1 mutations. Human reproduction (Oxford, England) 94 27798045
2016 Homozygous DNAH1 frameshift mutation causes multiple morphological anomalies of the sperm flagella in Chinese. Clinical genetics 73 27573432
2017 DNAH1 gene mutations and their potential association with dysplasia of the sperm fibrous sheath and infertility in the Han Chinese population. Fertility and sterility 71 28577616
2015 Variation in DNAH1 may contribute to primary ciliary dyskinesia. BMC medical genetics 55 25927852
2022 Novel DNAH1 Mutation Loci Lead to Multiple Morphological Abnormalities of the Sperm Flagella and Literature Review. The world journal of men's health 33 35118838
2021 Novel Loss-of-Function Mutations in DNAH1 Displayed Different Phenotypic Spectrum in Humans and Mice. Frontiers in endocrinology 16 34867808
2018 Associations between DNAH1 gene polymorphisms and male infertility: A retrospective study. Medicine 16 30544445
2021 Mutational landscape of DNAH1 in Chinese patients with multiple morphological abnormalities of the sperm flagella: cohort study and literature review. Journal of assisted reproduction and genetics 15 33929677
2023 Novel biallelic variants in DNAH1 cause multiple morphological abnormalities of sperm flagella with favorable outcomes of fertility after ICSI in Han Chinese males. Andrology 14 37302001
2022 Genetic Variations and mRNA Expression of Goat DNAH1 and Their Associations with Litter Size. Cells 14 35456050
2023 Novel axonemal protein ZMYND12 interacts with TTC29 and DNAH1, and is required for male fertility and flagellum function. eLife 13 37934199
2023 Novel compound heterozygous mutations in DNAH1 cause primary infertility in Han Chinese males with multiple morphological abnormalities of the sperm flagella. Asian journal of andrology 12 36510862
2021 Novel Biallelic DNAH1 Variations Cause Multiple Morphological Abnormalities of the Sperm Flagella. DNA and cell biology 11 33989052
2021 Novel bi-allelic mutations in DNAH1 cause multiple morphological abnormalities of the sperm flagella resulting in male infertility. Translational andrology and urology 10 33968654
2019 ENU-induced mutant allele of Dnah1, ferf1, causes abnormal sperm behavior and fertilization failure in mice. Molecular reproduction and development 9 30734403
2024 Primary Ciliary Dyskinesia Associated Disease-Causing Variants in CCDC39 and CCDC40 Cause Axonemal Absence of Inner Dynein Arm Heavy Chains DNAH1, DNAH6, and DNAH7. Cells 8 39056782
2015 A perilipin gene from Clonostachys rosea f. Catenulata HL-1-1 is related to sclerotial parasitism. International journal of molecular sciences 7 25761240
2023 Identification of novel compound heterozygous variants in the DNAH1 gene of a Chinese family with left-right asymmetry disorder. Frontiers in molecular biosciences 3 37457836
2021 Successful Live Birth Following Natural Cycle Oocyte Retrieval in a Woman with Primary Infertility and Atypical Primary Ovarian Insufficiency with a DNAH1 Gene Deletion Mutation. Genetic testing and molecular biomarkers 2 34672773
2026 Novel DNAH1 variants in Chinese males with MMAF-associated asthenoteratozoospermia. Systems biology in reproductive medicine 0 41615819
2024 Expanding the Genetic Etiology of Multiple Morphological Abnormalities of the Sperm Flagella: A Case Report of Two Novel DNAH1 Variants. South Dakota medicine : the journal of the South Dakota State Medical Association 0 39841794
2024 Glomerulocystic Kidney Disease in an Adult with DNAH1 Mutation: A Case Report. Indian journal of nephrology 0 40896606
2021 [Analysis of DNAH1 gene variant in two infertile males with multiple morphological abnormalities of sperm flagella]. Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics 0 34487528